Paper-fastener.



L. OPPENHEIM.

PAPER FASTENER.

APPLICATION FILED Aue.|2. 1916.

1,271,607, Patented-July 9,1918.

anvenfo'e 051; Quorum LEO OPPENHEIIVI, OF NEW YORK, N. Y., ASSIGNOR TO IDEAL SPECIALTIES MANUFAC- TURING CORPORATION, A CORPORATION OF NEW YORK.

PAPER-FASTENIER.

Specification of Letters Eatent.

Patented July 9, 1918.

Application filed August 12, 1916. Serial No. 114,552.

To all whom it'mag concern:

Be it known that I, LEO OPPENHEIM, a citizen of the United States, residing at New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Paper-Fasteners, of which the following is a full, clear, and exact specification.

This invention relates to paper fasteners composed of two opposite wings having penetrating devices which when compressed together set and lock the sheets of paper together. These fasteners, as heretofore made, have been of U-shape with the wlngs flat in transverse section. In these pr1or devices, the wings sometimes bend when pressed and upon release of the compression tend to spring apart owing to the resilience of the metal separating the aws so that the grip on the paper is relaxed.

The object of this invention is to overcome the tendency of the wings to spread apart by stiffening them by chamfering or flanging over the edges to prevent the wings from bending, confining the fiexure to the curved portion between them. When so strengthened the wings do not spring back upon release of the setting pressure but remain in close engagement with the paper. The rigidity of the wing portions also enables the fastener to be of thin stock and the connecting neck between the wings to be made as a relatively sharp curve. When compressed this sharper bend produces a thinner, neater and more efficient grip of the fastener on the paper and there is very little recoil or tendency of the wings to spread apart as they are held tightly gripped on the material and substantially parallel to each other. By my invention, as specifically shown herein, the wings are stiffened by having their edges inturned toward each other, starting just in front of the curved neck and extending around their ends. These inturned flanges cup the wings to strengthen them and bind on the sheets, giving the fastener an externally rounded appearance and adding materially to its neatness and salability. A further result of the invention is that the bend can be substantially in the form of a V, which still more confines the set and more firmly grips the sheets. With these short bends the neck acts as a hinge accurately registering the 1, 2 represent the wings, having the inturned stiffening edges 3, 4, respectively, extending from the ends of the wings to the V-shaped connecting bend 5. As will be seen, the inturned edges give the fastener a hollow appearance, and act as friction surfaces between which the sheets are firmly held. In the form of fastener herein shown, the base wing 1 is provided with two prongs 6, 6, struck up from the base, and which pass into corresponding hoods or caps 7 or prong housings on the upper member 2, and are shielded thereby. The members 1, 2, are preferably narrowed at the neck where the bend is made, as seen in Fig. 1. The member 2 is also transversely stilfened by a curved rib 8, which also acts as a finger hold. The separated "edges 3, 4, in conjunction with one or more intervening prongs 6 provide multiple bearing points on the papers 9, g

and hold the papers more firmly without pivoting than is the case where the inner surfaces of the wings are fat transversely. Also, catching of other papers under the edges is avoided, because of the close fit of this fastener on the papers. By reason of the set of the metal bein localized at the bend to a greater extentlt an in any prior fastener of this type, the bend itself can be more nearly V-shaped, whereas in prior fasteners, the bend has been U-shaped. The V-shaped bend holds the members more closely together when set and thereby grips the papers more firmly, and the prongs always register with the housings or sockets said various changes and modifications may be made without departing from the scope of the appended claims.

Havin thus described my invention, I declare t at what I claim as new and desire to secure by Letters Patent, is

1. A paper fastener comprising a plurality of holding portions at an angle to each other and connected by a neck of short curvature so as to be substantially in the form of a V, a prong on one of said holding portions and a mating housin on the other of said holding portions, an stiflening edge on one of said holding portions cupping-said portion so as to deepen said rong housing and bring the edges of liolding portions close to the paper in set position and extending from said bend an inturned to the point of application of the setting pressure so as to confine the bending to the neck' and to bring the prong and its housing into accurate register when set.

2. A paper fastener comprising a plurality of holding portions at an angle to each other and connected by a neck of short curvature so as to be substantially in the form of a V, an inward projecting prong on one of said holding portlons and an outward projecting closed housing on the other of said holdmg portionsand adapted to receive said prong, and inturned stifi'enin edges on said holding portions cupping sai portions so as to deepen. said prong housing and bring the edges of said holding portions close to the paper in set position and ex- I tending-from the bend to the points of application of the setting pressure so as to confine the bending to the neck and bring the prong and its housing into accurate register when set. 4

In testimony whereof I aflix my signature.

LEO OPPENHEIM. 

